It used to be a key (ctrl) but now (v4) there is a small "D" button on the dictionary and commentary window toolbars that does the same. The button is selected (in) by default which causes all click actions to go to the default resource. If the button is not "On," the actions will be performed on the current resource.

Tim MortonDeveloper, Bible Analyzer

But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness. (Rom 4:5 AV)

Yes I get it now. I was looking at the very good video you made, and you said that holding down the Alt key would change the behaviour. I had not realized that, I had to unselect the "d" in the view for this to work as stated.Do you consider this to be an issue?